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demo crate not valid identifier #2

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demo crate not valid identifier #2

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16 changes: 16 additions & 0 deletions tests/test.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -145,3 +145,19 @@ fn test_false_start() {
assert_eq!(x[0], 0);
}
}

macro_rules! crate_not_valid_identifier {
($module:ident) => {
struct $module;
};
() => {
paste::item! {
$crate::crate_not_valid_identifier! { [<Lib env!("CARGO_PKG_NAME")>] }
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$crate:: is needed to enable 2018 style imports

}
}
}

#[test]
fn test_crate_not_valid_identifier() {
crate_not_valid_identifier!();
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this currently fails with this error message

error: proc macro panicked
   --> tests/test.rs:154:9
    |
154 | /         paste::item! {
155 | |             $crate::crate_not_valid_identifier! { [<Lib env!("CARGO_PKG_NAME")>] }
156 | |         }
    | |_________^
...
162 |      crate_not_valid_identifier!();
    |      ------------------------------ in this macro invocation
    |
    = help: message: `"$crate"` is not a valid identifier

}